1 files changed, 138 insertions, 0 deletions

diff --git a/arch/ia64/include/asm/smp.h b/arch/ia64/include/asm/smp.h
new file mode 100644
index 000000000000..12d96e0cd513
--- /dev/null
+++ b/arch/ia64/include/asm/smp.h
@@ -0,0 +1,138 @@
+/*
+ * SMP Support
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P.
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ *      Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+#ifndef _ASM_IA64_SMP_H
+#define _ASM_IA64_SMP_H
+
+#include <linux/init.h>
+#include <linux/threads.h>
+#include <linux/kernel.h>
+#include <linux/cpumask.h>
+#include <linux/bitops.h>
+#include <linux/irqreturn.h>
+
+#include <asm/io.h>
+#include <asm/param.h>
+#include <asm/processor.h>
+#include <asm/ptrace.h>
+
+static inline unsigned int
+ia64_get_lid (void)
+{
+        union {
+                struct {
+                        unsigned long reserved : 16;
+                        unsigned long eid : 8;
+                        unsigned long id : 8;
+                        unsigned long ignored : 32;
+                } f;
+                unsigned long bits;
+        } lid;
+
+        lid.bits = ia64_getreg(_IA64_REG_CR_LID);
+        return lid.f.id << 8 | lid.f.eid;
+}
+
+#define hard_smp_processor_id()         ia64_get_lid()
+
+#ifdef CONFIG_SMP
+
+#define XTP_OFFSET              0x1e0008
+
+#define SMP_IRQ_REDIRECTION     (1 << 0)
+#define SMP_IPI_REDIRECTION     (1 << 1)
+
+#define raw_smp_processor_id() (current_thread_info()->cpu)
+
+extern struct smp_boot_data {
+        int cpu_count;
+        int cpu_phys_id[NR_CPUS];
+} smp_boot_data __initdata;
+
+extern char no_int_routing __devinitdata;
+
+extern cpumask_t cpu_online_map;
+extern cpumask_t cpu_core_map[NR_CPUS];
+DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+extern int smp_num_siblings;
+extern void __iomem *ipi_base_addr;
+extern unsigned char smp_int_redirect;
+
+extern volatile int ia64_cpu_to_sapicid[];
+#define cpu_physical_id(i)      ia64_cpu_to_sapicid[i]
+
+extern unsigned long ap_wakeup_vector;
+
+/*
+ * Function to map hard smp processor id to logical id.  Slow, so don't use this in
+ * performance-critical code.
+ */
+static inline int
+cpu_logical_id (int cpuid)
+{
+        int i;
+
+        for (i = 0; i < NR_CPUS; ++i)
+                if (cpu_physical_id(i) == cpuid)
+                        break;
+        return i;
+}
+
+/*
+ * XTP control functions:
+ *      min_xtp   : route all interrupts to this CPU
+ *      normal_xtp: nominal XTP value
+ *      max_xtp   : never deliver interrupts to this CPU.
+ */
+
+static inline void
+min_xtp (void)
+{
+        if (smp_int_redirect & SMP_IRQ_REDIRECTION)
+                writeb(0x00, ipi_base_addr + XTP_OFFSET); /* XTP to min */
+}
+
+static inline void
+normal_xtp (void)
+{
+        if (smp_int_redirect & SMP_IRQ_REDIRECTION)
+                writeb(0x08, ipi_base_addr + XTP_OFFSET); /* XTP normal */
+}
+
+static inline void
+max_xtp (void)
+{
+        if (smp_int_redirect & SMP_IRQ_REDIRECTION)
+                writeb(0x0f, ipi_base_addr + XTP_OFFSET); /* Set XTP to max */
+}
+
+/* Upping and downing of CPUs */
+extern int __cpu_disable (void);
+extern void __cpu_die (unsigned int cpu);
+extern void cpu_die (void) __attribute__ ((noreturn));
+extern void __init smp_build_cpu_map(void);
+
+extern void __init init_smp_config (void);
+extern void smp_do_timer (struct pt_regs *regs);
+
+extern irqreturn_t handle_IPI(int irq, void *dev_id);
+extern void smp_send_reschedule (int cpu);
+extern void identify_siblings (struct cpuinfo_ia64 *);
+extern int is_multithreading_enabled(void);
+
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi(cpumask_t mask);
+
+#else /* CONFIG_SMP */
+
+#define cpu_logical_id(i)               0
+#define cpu_physical_id(i)              ia64_get_lid()
+
+#endif /* CONFIG_SMP */
+#endif /* _ASM_IA64_SMP_H */